How the alarm works

This info is taken from amazon:
"Water resistant to 50 m (165 ft): In general, suitable for short periods of recreational swimming, but not diving or snorkeling"
and check-out this link
Amazon com Customer reviews Kenneth Cole New York Men KC3915 Iconic...

You can get instructions from the Amitron web site.
Copy "www.armitron.com/watch_instructions.asp" into your search engine
and you will see a list of illustrations of watches and associated
instructions.

Choose the one that looks like yours and download the PDF file.

This site gives an illustration showing the button labels, so it should solve your problem.

You need to take the watch to a watch expert. Most watches are not designed to be serviced by the owner. There are a couple of national chains of watch repair stores that specialize in battery replacement as well as a vanishing number of full-service watch repair shops. Most jewelers are not trained nor do they have the tools to do a proper battery replacement. Since this is a water resistant watch, make sure the place you take it to can re-seal the back and pressure test it to ensure the water resistance. The best place I've found is Precision Time. They are located in most major cities in major shopping malls and can service the watch while you shop. Check out www.precisiontimeco.com for nearest location. There are also a lot of FastFix locations around, but most are not able to reseal the watches.

The most common failure of a watch to be water resistant is caused by a faulty contact between the case at an opening around the glass, crown, or pushbutton and the opening's gasket. Worn or defective rubber O-rings are often a cause of failure. Condensation forming under the crystal of a watch following a sharp temperature change (a swim after a stretch in the sun, for example) tells you to have the watch checked without delay. This can be an indication of additional moisture elsewhere inside the case. It is also the only water-tightness check a consumer can perform.
Of course non-water-resistant watches don't contain the additional seals and gaskets found on water-resistant models. Consequently, moisture-laden air can easily enter the case. Once inside, a pronounced change in temperature may cause condensation to form under the crystal. Very little can be done to prevent this. A high-quality water-resistant watch, however, properly serviced and maintained, will be sealed to prevent internal water damage and will more than outlast an ordinary watch.
To keep the watch properly sealed, replace any defective parts , such as gaskets, crystals, and crowns. Water-resistant watches should be tested for case tightness at least once a year, as well as every time the watch is opened, such as when a battery is replaced.

mcdevito75 here, Even with the proper tools we still have to improvise at times, Instead of useing your case opener from your tool kit, use a steak knife or similar with a sharp edge inside that groove you"ve described, the cover will pry off.

mcdevito75 here, You can visit a small watch repair shop in your area for info, as some watch makers only deal with their watches commercialy.

Copy "www.armitron.com/watch_instructions.asp" into your search engine and you will see a list of illustrations of watches and associated
instructions.

Choose the one that looks like yours and download the PDF file.

WR 165 simply means Water Resistant to 165 feet. The model of your watch is stamped on the back of the watch face.

Check out this website for possible instructions, and at least they can sort of help you get started....

http://www.armitron.com/watch_instructions.asp

I think I have the same watch and was just looking here to see if I could find how to stop the alarm going off every hour! However, I think I do know how to change the time: press the mode button three times (the first one brings up something like the stopwatch, the second brings up what may be an alarm time). On the third press you should get the time appearuing with the seconds flashing on the far right of the display. You can then change the second by pressing the"start" button. To change the minutes or hours, oress the "reset" button until they start flashing and use the start button again. pressing the reset button again will bring up the date to change. keep pressing until nothing is flashing any more and poress mode and it should bring you back to the current time. hope you can follow this and it works!